onsemi BC327-025G

Overview

BC327-025G from onsemi is a PNP epitaxial silicon transistor designed for low-power switching and linear amplification, with V_CEO = −45 V, I_C = −800 mA, h_FE = 160–400 at I_C = −100 mA, and TO-92 package. It serves as a complement to BC337/BC338 in push-pull output stages of audio amplifiers and relay drivers.

For engineers reviewing the BC327-025G datasheet, pinout, applications, or equivalent options, key selection criteria include DC current gain classification (25), saturation voltage under 500 mA load, thermal resistance (200 °C/W), and Pb-free TO-92 3-lead compatibility with legacy through-hole layouts.

Technical Context

This device operates as a general-purpose PNP bipolar junction transistor with fixed emitter-base and collector-emitter breakdown limits (V_EBO = −5 V, V_CES = −50 V) and specified gain-bandwidth product (f_T = 100 MHz). Its h_FE binning (25) guarantees minimum DC current gain of 160 at −100 mA and 100 at −300 mA.

Thermal performance is defined by 625 mW maximum power dissipation at 25 °C, derating linearly at 5.0 mW/°C above ambient, and junction-to-ambient thermal resistance of 200 °C/W on standard FR-4 PCB. Saturation behavior is characterized at I_C/I_B = 10 with V_CE(sat) ≤ −0.7 V and V_BE(on) ≤ −1.2 V.

Key Specifications

Pinout & Package

BC327-025G is housed in a Pb-free TO-92 3-lead plastic package (Case 135AN), with standardized leadform and footprint dimensions of 4.825 mm × 4.76 mm. The package supports manual and automated through-hole assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP transistor applications.

Compared with BC327-25, BC327-025G offers identical performance with G-marked traceability; versus MPSA92, it delivers superior h_FE and lower V_CE(sat) at the cost of reduced voltage rating-making BC327-025G optimal for general-purpose 45 V, 800 mA PNP roles.

Availability

BC327-025G is available at Aetrix Electronics and suitable for audio amplifier drivers, relay control circuits, LED current regulators, and signal level shifters requiring stable component supply and RoHS-compliant through-hole transistors.

Supply support for BC327-025G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

onsemi (formerly ON Semiconductor) is a global semiconductor manufacturer specializing in energy-efficient power management, analog, sensors, and discrete devices for automotive, industrial, and consumer markets.

The BC327 series belongs to onsemi's general-purpose bipolar transistor product line, engineered for reliable low-power switching and linear amplification in cost-sensitive, high-volume applications.

FAQ

What is the h_FE range guaranteed for BC327-025G?

The BC327-025G is binned to the "25" h_FE classification, guaranteeing a DC current gain of 160–400 when measured at V_CE = −1 V and I_C = −100 mA. This range ensures predictable base drive requirements in amplifier bias networks and switching circuits where gain consistency matters.

Does BC327-025G have the same pinout as BC337?

Yes, BC327-025G uses the standard TO-92 3-lead pinout (1: Collector, 2: Base, 3: Emitter), which matches the physical pin assignment of its complementary NPN counterpart BC337. This allows direct placement in push-pull or differential pair layouts without board revision.

What is the maximum power dissipation of BC327-025G at 70 °C ambient?

At 70 °C ambient, BC327-025G's maximum power dissipation is 412.5 mW, calculated by derating the 625 mW rating at 25 °C at 5.0 mW/°C: 625 mW − (70 − 25) × 5.0 mW = 412.5 mW. This value assumes standard FR-4 PCB mounting per datasheet Note 1.

Is BC327-025G suitable for switching 24 V inductive loads?

BC327-025G supports V_CEO = −45 V, making it suitable for switching 24 V inductive loads such as relays or solenoids, provided external flyback protection (e.g., diode clamp) is used to suppress voltage spikes exceeding −45 V during turn-off.

How does BC327-025G differ from BC327-40G?

BC327-025G and BC327-40G share identical package, absolute ratings, and thermal characteristics, differing only in h_FE binning: BC327-025G guarantees 160–400 h_FE, while BC327-40G guarantees 250–630. Select BC327-025G when moderate gain suffices and tighter gain distribution improves yield in production amplifier builds.